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High-strength abrasion-proof steel plate and method for producing the same

A wear-resistant steel plate and high-strength technology, which is applied in the field of high-strength wear-resistant steel plate for construction machinery and its preparation, can solve problems such as brittle fracture, poor matching performance, and processing thickness restrictions, and achieve high tensile strength and welding Good performance and the effect of ensuring hardenability

Inactive Publication Date: 2009-06-10
WUYANG IRON & STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current wear-resistant steel generally can only meet the requirements of hardness, and the matching performance of strength and toughness is poor. It is prone to problems such as brittle fracture during use. In addition, the processing thickness is also limited. The development of high-strength wear-resistant thick steel plates there is a bottleneck

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045]High-strength wear-resistant steel plate, thickness 50mm, its chemical composition is: C 0.16%, Si 0.40%, Mn 1.25%, P 0.010%, S 0.003%, Ni 0.20%, V 0.054%, Nb 0.021%, Al 0.036% , Cr 0.22%, Mo 0.27%, Ti 0.015%, B 0.0024%, the balance is iron and unavoidable impurities. Its mechanical properties: yield strength 1120MPa, tensile strength: 1350Mpa; Brinell hardness of steel plate section: 410~415; transverse impact at -40°C: 29J 35J 36J; cold bending d=3a, good.

[0046] Prepare as follows:

[0047] (1) Smelting process: first smelt the molten steel containing the chemical components of the above weight percentages in a 90-ton UHP electric furnace, then send it to the LF refining furnace for refining, and feed 550 meters of Al wire. The refining process ensures that the refining slag is white to ensure Deoxidation effect: after the refining is completed, vacuum treatment is carried out in the hanging bag VD furnace, and 90kg of SiCa blocks are added before vacuuming, and th...

Embodiment 2

[0055] High-strength wear-resistant steel plate, thickness 25mm, its chemical composition is: C 0.15%, Si 0.50%, Mn 1.20%, P 0.008%, S 0.004%, Ni 0.23%, V 0.050%, Nb 0.022%, Al 0.030% , Cr 0.25%, Mo 0.28%, Ti 0.018%, B 0.0025%, and the balance is iron and unavoidable impurities. Its mechanical properties: yield strength 1110MPa, tensile strength: 1330Mpa; steel plate section Brinell hardness: 405 ~ 410; -40 ℃ transverse impact: 37J 38J 30J; cold bending d = 3a, good.

[0056] Prepare as follows:

[0057] (1) Smelting process: first smelt the molten steel containing the above-mentioned chemical components in various weight percentages in a 90-ton UHP electric furnace, then send it to the LF refining furnace for refining, and feed 520 meters of Al wire. The refining process ensures that the refining slag is white to ensure Deoxidation effect: after the refining is completed, vacuum treatment is carried out in the hanging bag VD furnace, and 90kg of SiCa blocks are added before ...

Embodiment 3

[0065] High-strength wear-resistant steel plate, thickness 16mm, its chemical composition is: C 0.14%, Si 0.45%, Mn 1.20%, P 0.012%, S 0.003%, Ni 0.16%, V 0.049%, Nb 0.020%, Al 0.025% , Cr 0.20%, Mo 0.26%, Ti 0.020%, B 0.0028%, and the balance is iron and unavoidable impurities. Its mechanical properties: yield strength 1080MPa, tensile strength: 1300Mpa; steel plate section Brinell hardness: 398 ~ 405; -40 ℃ transverse impact: 40J 32J 37J; cold bending d = 3a, good.

[0066] Prepare as follows:

[0067] (1) Smelting process: The molten steel containing the above-mentioned chemical components in various weight percentages is first smelted in a 90-ton UHP electric furnace, then sent to an LF refining furnace for refining, and fed to an Al wire of 500 meters. The refining process ensures that the refining slag is white, so as to ensure Deoxidation effect: after the refining is completed, vacuum treatment in the hanging bag VD furnace, add 75kg of SiCa block before vacuum, the v...

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Abstract

The invention relates to a high strength wear resistant steel plate, which comprises the following chemical components by weight percentage: 0.12 to 0.16 percent of C, 0.10 to 0.70 percent of Si, 0.90 to 1.50 percent of Mn, less than or equal to 0.020 percent of P, less than or equal to 0.010 percent of S, 0.05 to 0.30 percent of Ni, 0.03 to 0.08 percent of V, 0.01 to 0.06 percent of Nb, 0.020 to 0.08 percent of Al, 0.20 to 0.70 percent of Cr, 0. 1 to 0.50 percent of Mo, 0.010 to 0.060 percent of Ti, 0.0005 to 0.0030 percent of B, and the balance being Fe and inevitable impurities. The steel plate manufactured through reasonable design of alloy components and main control of quenching and temper processes has the thickness of 60mm, ball hardness number between 360 and 440, even hardness distribution, tensile strength not less than 1,220MPa, good welding performance, good cold bending performance, good impact toughness, excellent steel plate shape, and wide application prospect, and can be widely applied to engineering machinery manufacturing.

Description

(1) Technical field [0001] The invention relates to a high-strength wear-resistant steel plate for engineering machinery and a preparation method thereof. (2) Background technology [0002] With the development of national economic construction, the market demand for high-strength wear-resistant steel is increasing day by day. Especially coal mining machinery, engineering machinery, hydropower, bridges and other industries. Most of the existing high-strength wear-resistant steels are quenched and tempered steels, which are mainly used in the manufacture of floor plates of mining vehicles over 100 tons, excavator buckets and other components. However, the current wear-resistant steel generally can only meet the requirements of hardness, and the matching performance of strength and toughness is poor. It is prone to problems such as brittle fracture during use. In addition, the processing thickness is also limited. The development of high-strength wear-resistant thick steel pl...

Claims

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Application Information

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IPC IPC(8): C22C38/54C22C33/04C21C7/00C21D8/02C21D1/18C21D9/46C21D7/06
Inventor 谢良法郭桐韦明刘生吕建会张彦召
Owner WUYANG IRON & STEEL
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